Measurement of the W+W- cross section in √s = 7 TeV pp collisions with ATLAS

Authors	G. Aad [Unknown] et al. S. Bentvelsen A.P. Colijn P. de Jong L. de Nooij A.D. Doxiadis P. Ferrari H. Garitaonandia D.A.A. Geerts M. Gosselink M.S. Kayl E. Koffeman H. Lee F. Linde J. Mechnich I. Mussche J.P. Ottersbach M. Tsiakiris E. van der Kraaij R. van der Leeuw Z. van Kesteren I.B. van Vulpen J.C. Vermeulen M. Vreeswijk
Publication date	2011
Journal	Physical Review Letters
Article number	041802
Volume \| Issue number	107 \| 4
Number of pages	18
Organisations	Faculty of Science (FNWI) - Institute of Physics (IoP) - Institute for High Energy Physics (IHEF)
Abstract	This Letter presents a measurement of the W+W- production cross section in √s=7 TeV pp collisions by the ATLAS experiment, using 34 pb-1 of integrated luminosity produced by the Large Hadron Collider at CERN. Selecting events with two isolated leptons, each either an electron or a muon, 8 candidate events are observed with an expected background of 1.7±0.6 events. The measured cross section is 41-16+20(stat) ± 5(syst) ± 1(lumi) pb, which is consistent with the standard model prediction of 44±3 pb calculated at next-to-leading order in QCD.
Document type	Article
Note	ATLAS Collaboration
Language	English
Published at	https://doi.org/10.1103/PhysRevLett.107.041802
Downloads	358965.pdf (Final published version)
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